[compiler-rt][AIX]: Link compiler-rt profile library when -fprofile-generate is specified

This patch enhances the clang driver to link the runtime profile
library on AIX when the -fprofile-generate option is used.

Reviewed By: phosek

Differentail Revision: https://reviews.llvm.org/D90641

Author: etiotto

clang/lib/Driver/ToolChains/AIX.cpp

@@ -151,6 +151,7 @@ void aix::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   // Add directory to library search path.
   Args.AddAllArgs(CmdArgs, options::OPT_L);
   ToolChain.AddFilePathLibArgs(Args, CmdArgs);
+  ToolChain.addProfileRTLibs(Args, CmdArgs);
 
   if (getToolChain().ShouldLinkCXXStdlib(Args))
     getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);