Detect if llvm-gcc is built on dragonegg.

Store the flags needed to disable optimizations and to emit LLVM-IR depending on
the version of llvm-gcc used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118684 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Makefile.config.in b/Makefile.config.in
index 662e57f..9c2f4e6 100644
--- a/Makefile.config.in
+++ b/Makefile.config.in
@@ -195,6 +195,8 @@
 LLVMCC1  := @LLVMCC1@
 LLVMCC1PLUS := @LLVMCC1PLUS@
 LLVMGCC_LANGS := @LLVMGCC_LANGS@
+LLVMGCC_DRAGONEGG := @LLVMGCC_DRAGONEGG@
+LLVMGCC_DISABLEOPT_FLAGS := @LLVMGCC_DISABLEOPT_FLAGS@
 
 # Information on Clang, if configured.
 CLANGPATH := @CLANGPATH@
@@ -204,6 +206,9 @@
 # The LLVM capable compiler to use.
 LLVMCC_OPTION := @LLVMCC_OPTION@
 
+# The flag used to emit LLVM IR.
+LLVMCC_EMITIR_FLAG = @LLVMCC_EMITIR_FLAG@
+
 # Path to directory where object files should be stored during a build.
 # Set OBJ_ROOT to "." if you do not want to use a separate place for
 # object files.