[WebAssembly] Add data size and alignement to linking section

The overal size of the data section (including BSS)
is otherwise not included in the wasm binary.

Differential Revision: https://reviews.llvm.org/D34657

llvm-svn: 306459
diff --git a/llvm/test/MC/WebAssembly/unnamed-data.ll b/llvm/test/MC/WebAssembly/unnamed-data.ll
index 77a7c08..fd98508 100644
--- a/llvm/test/MC/WebAssembly/unnamed-data.ll
+++ b/llvm/test/MC/WebAssembly/unnamed-data.ll
@@ -7,47 +7,53 @@
 @b = global i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str2, i32 0, i32 0), align 8
 
 
-; CHECK:   - Type:            GLOBAL
-; CHECK:     Globals:         
-; CHECK:       - Type:            I32
-; CHECK:         Mutable:         false
-; CHECK:         InitExpr:        
-; CHECK:           Opcode:          I32_CONST
-; CHECK:           Value:           0
-; CHECK:       - Type:            I32
-; CHECK:         Mutable:         false
-; CHECK:         InitExpr:        
-; CHECK:           Opcode:          I32_CONST
-; CHECK:           Value:           6
-; CHECK:       - Type:            I32
-; CHECK:         Mutable:         false
-; CHECK:         InitExpr:        
-; CHECK:           Opcode:          I32_CONST
-; CHECK:           Value:           16
-; CHECK:       - Type:            I32
-; CHECK:         Mutable:         false
-; CHECK:         InitExpr:        
-; CHECK:           Opcode:          I32_CONST
-; CHECK:           Value:           24
-; CHECK:   - Type:            EXPORT
-; CHECK:     Exports:         
-; CHECK:       - Name:            a
-; CHECK:         Kind:            GLOBAL
-; CHECK:         Index:           2
-; CHECK:       - Name:            b
-; CHECK:         Kind:            GLOBAL
-; CHECK:         Index:           3
-; CHECK:   - Type:            DATA
-; CHECK:     Relocations:     
-; CHECK:       - Type:            R_WEBASSEMBLY_GLOBAL_ADDR_I32
-; CHECK:         Index:           0
-; CHECK:         Offset:          0x00000016
-; CHECK:       - Type:            R_WEBASSEMBLY_GLOBAL_ADDR_I32
-; CHECK:         Index:           1
-; CHECK:         Offset:          0x0000001E
-; CHECK:     Segments:        
-; CHECK:       - Index:           0
-; CHECK:         Offset:          
-; CHECK:           Opcode:          I32_CONST
-; CHECK:           Value:           0
-; CHECK:         Content:         68656C6C6F00776F726C640000000000000000000000000006000000
+; CHECK:        - Type:            GLOBAL
+; CHECK-NEXT:     Globals:         
+; CHECK-NEXT:       - Type:            I32
+; CHECK-NEXT:         Mutable:         false
+; CHECK-NEXT:         InitExpr:        
+; CHECK-NEXT:           Opcode:          I32_CONST
+; CHECK-NEXT:           Value:           0
+; CHECK-NEXT:       - Type:            I32
+; CHECK-NEXT:         Mutable:         false
+; CHECK-NEXT:         InitExpr:        
+; CHECK-NEXT:           Opcode:          I32_CONST
+; CHECK-NEXT:           Value:           6
+; CHECK-NEXT:       - Type:            I32
+; CHECK-NEXT:         Mutable:         false
+; CHECK-NEXT:         InitExpr:        
+; CHECK-NEXT:           Opcode:          I32_CONST
+; CHECK-NEXT:           Value:           16
+; CHECK-NEXT:       - Type:            I32
+; CHECK-NEXT:         Mutable:         false
+; CHECK-NEXT:         InitExpr:        
+; CHECK-NEXT:           Opcode:          I32_CONST
+; CHECK-NEXT:           Value:           24
+; CHECK-NEXT:   - Type:            EXPORT
+; CHECK-NEXT:     Exports:         
+; CHECK-NEXT:       - Name:            a
+; CHECK-NEXT:         Kind:            GLOBAL
+; CHECK-NEXT:         Index:           2
+; CHECK-NEXT:       - Name:            b
+; CHECK-NEXT:         Kind:            GLOBAL
+; CHECK-NEXT:         Index:           3
+; CHECK-NEXT:   - Type:            DATA
+; CHECK-NEXT:     Relocations:     
+; CHECK-NEXT:       - Type:            R_WEBASSEMBLY_GLOBAL_ADDR_I32
+; CHECK-NEXT:         Index:           0
+; CHECK-NEXT:         Offset:          0x00000016
+; CHECK-NEXT:       - Type:            R_WEBASSEMBLY_GLOBAL_ADDR_I32
+; CHECK-NEXT:         Index:           1
+; CHECK-NEXT:         Offset:          0x0000001E
+; CHECK-NEXT:     Segments:        
+; CHECK-NEXT:       - Index:           0
+; CHECK-NEXT:         Offset:          
+; CHECK-NEXT:           Opcode:          I32_CONST
+; CHECK-NEXT:           Value:           0
+; CHECK-NEXT:         Content:         68656C6C6F00776F726C640000000000000000000000000006000000
+; CHECK-NEXT:   - Type:            CUSTOM
+; CHECK-NEXT:     Name:            linking
+; CHECK-NEXT:     DataSize:        28
+; CHECK-NEXT:     DataAlignment:   8
+; CHECK-NEXT:     SymbolInfo:      
+; CHECK-NEXT: ...