bug 575519 - add a VC9-built dump_syms.exe, choose dump_syms based on compiler version. r=mitch, a=legneato

--HG--
rename : toolkit/crashreporter/tools/win32/dump_syms.exe => toolkit/crashreporter/tools/win32/dump_syms_vc1400.exe
extra : rebase_source : 3343baae2b65666b3d2d54a1e2c13fecce85d387

Makefile.in

@@ -142,7 +142,7 @@ ifeq (,$(CYGWIN_WRAPPER))
 # this doesn't work with Cygwin Python
 MAKE_SYM_STORE_ARGS += --vcs-info
 endif
-DUMP_SYMS_BIN ?= $(topsrcdir)/toolkit/crashreporter/tools/win32/dump_syms.exe
+DUMP_SYMS_BIN ?= $(topsrcdir)/toolkit/crashreporter/tools/win32/dump_syms_vc$(_MSC_VER).exe
 # PDB files don't get moved to dist, so we need to scan the whole objdir
 MAKE_SYM_STORE_PATH := .
 endif