[llvm-symbolizer] Add support for -i and -inlines as aliases for -inlining

This change adds two options, -i and -inlines as aliases for the -inlining option to llvm-symbolizer to improve compatibility with the GNU addr2line utility which accepts these options.

It also modifies existing tests that use -inlining to exercise these new aliases as well.

This fixes PR40073.

Reviewed by: jhenderson, Quolyk, ruiu

Differential Revision: https://reviews.llvm.org/D57083

llvm-svn: 351999
diff --git a/llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp b/llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp
index 83b39d9..0134f1c 100644
--- a/llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp
+++ b/llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp
@@ -58,6 +58,13 @@
 static cl::opt<bool>
     ClPrintInlining("inlining", cl::init(true),
                     cl::desc("Print all inlined frames for a given address"));
+static cl::alias
+    ClPrintInliningAliasI("i", cl::desc("Alias for -inlining"),
+                          cl::NotHidden, cl::aliasopt(ClPrintInlining),
+                          cl::Grouping);
+static cl::alias
+    ClPrintInliningAliasInlines("inlines", cl::desc("Alias for -inlining"),
+                                cl::NotHidden, cl::aliasopt(ClPrintInlining));
 
 // -basenames, -s
 static cl::opt<bool> ClBasenames("basenames", cl::init(false),