use a wrapper script to call MS link.exe to avoid mixing with /usr/bin/link.exe

Fallback to "link" in the path if the one next to cl is not found.
Signed-off-by: Martin Storsjö <martin@martin.st>

compat/windows/mslink

+#!/bin/sh
+
+LINK_EXE_PATH=$(dirname "$(command -v cl)")/link
+if [ -x "$LINK_EXE_PATH" ]; then
+    "$LINK_EXE_PATH" $@
+else
+    link $@
+fi
+exit $?

configure

@@ -2633,7 +2633,7 @@ case "$toolchain" in
         else
             cc_default="c99wrap cl"
         fi
-        ld_default="link"
+        ld_default="$source_path/compat/windows/mslink"
         nm_default="dumpbin -symbols"
         ar_default="lib"
         target_os_default="win32"