Bug 882770 - Do not use the MSVC driver commands for clang on Windows; r=ted

configure.in

@@ -2054,7 +2054,7 @@ ia64*-hpux*)
     MC=mc.exe
     # certain versions of cygwin's makedepend barf on the
     # #include <string> vs -I./dist/include/string issue so don't use it
-    if test -n "$GNU_CC"; then
+    if test -n "$GNU_CC" -o -n "$CLANG_CC"; then
         CC="$CC -mwindows"
         CXX="$CXX -mwindows"
         CPP="$CPP -mwindows"

js/src/configure.in

@@ -1621,7 +1621,7 @@ ia64*-hpux*)
     DLL_SUFFIX=.dll
     RC=rc.exe
     MC=mc.exe
-    if test -n "$GNU_CC"; then
+    if test -n "$GNU_CC" -o -n "$CLANG_CC"; then
         CC="$CC -mwindows"
         CXX="$CXX -mwindows"
         CPP="$CPP -mwindows"