gcc-wrappers: recognise -ggdb.* in addition to -g as debug flag

Firebird uses -ggdb.  This causes it to have 2 PDB files, however
this isn't sufficient to make BinScope happy, more investigation
needed.

Change-Id: I5286964586eaffea36790ab7a7ca2df75d85f068

solenv/gcc-wrappers/wrapper.cxx

@@ -127,7 +127,7 @@ string processccargs(vector<string> rawargs) {
                 exit(1);
             }
         }
-        else if(*i == "-g") {
+        else if(*i == "-g" || !(*i).compare(0,5,"-ggdb")) {
             args.append("-Zi");
             args.append(" -FS");
         }