Remove -h option from comgr-objdump

The -h option (short for -headers) is a legal objdump option.
However registering this as an LLVM option by Comgr prevents other
LLVM tools or instances from registering a -h option in the same
process, which is an issue because -h is a common short form for
-help.

A long term solution will be to libraryize llvm-obj dump, and
call it in Comgr via an API instead of re-implementation, which
will eliminate the need for Comgr to register any LLVM options for
objdump.

Change-Id: Ieb1981aeb1826422647fd301c4827e2bfb370560

lib/comgr/src/comgr-objdump.cpp

@@ -175,9 +175,9 @@ cl::opt<bool> SectionHeaders("section-headers",
 static cl::alias SectionHeadersShort("headers",
                                      cl::desc("Alias for --section-headers"),
                                      cl::aliasopt(SectionHeaders));
-static cl::alias SectionHeadersShorter("h",
-                                       cl::desc("Alias for --section-headers"),
-                                       cl::aliasopt(SectionHeaders));
+// The following option has been removed to avoid conflicts with
+// other llvm tools/instances also attempting to register a -h option
+//   static cl::alias SectionHeadersShorter("h", ...)
 
 cl::list<std::string>
     FilterSections("section",