Bug 1448746 Capitalization fixes for MinGW x64 build in the crash reporter r=gsvelto

MozReview-Commit-ID: 8tZkuachYhX

--HG--
extra : rebase_source : d368302e6eb7d0bda9f5492c632f84ff70974429

toolkit/crashreporter/minidump-analyzer/moz.build

@@ -25,8 +25,8 @@ if CONFIG['OS_TARGET'] != 'Android':
             ]
 
             OS_LIBS += [
-                'Dbghelp',
-                'Imagehlp'
+                'dbghelp',
+                'imagehlp'
             ]
 
     if CONFIG['OS_TARGET'] == 'WINNT' and CONFIG['CC_TYPE'] == 'gcc':