aclocal.m4: Search for otool using AC_CHECK_TOOL.

[Sebastian Lackner]

From: Michael Müller <michael at fds-team.de>

With this patch ./configure also finds otool when crosscompiling, for example:
checking for i686-apple-darwin12-otool... i686-apple-darwin12-otool

---
 aclocal.m4 |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/aclocal.m4 b/aclocal.m4
index 3d43721..f7a12f1 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -42,6 +42,7 @@ dnl Usage: WINE_PATH_PKG_CONFIG
 dnl
 AC_DEFUN([WINE_PATH_SONAME_TOOLS],
 [AC_PATH_PROG(LDD,ldd,true,/sbin:/usr/sbin:$PATH)
+AC_CHECK_TOOL(OTOOL,otool,otool)
 AC_CHECK_TOOL(READELF,[readelf],true)])
 
 AC_DEFUN([WINE_PATH_PKG_CONFIG],
@@ -62,7 +63,7 @@ LIBS="-l$1 $5 $LIBS"
   AC_LINK_IFELSE([AC_LANG_CALL([], [$2])],
   [case "$LIBEXT" in
     dll) AS_VAR_SET(ac_Lib,[`$ac_cv_path_LDD conftest.exe | grep "$1" | sed -e "s/dll.*/dll/"';2,$d'`]) ;;
-    dylib) AS_VAR_SET(ac_Lib,[`otool -L conftest$ac_exeext | grep "ac_lib_pattern\\.[[0-9A-Za-z.]]*dylib" | sed -e "s/^.*\/\(ac_lib_pattern\.[[0-9A-Za-z.]]*dylib\).*$/\1/"';2,$d'`]) ;;
+    dylib) AS_VAR_SET(ac_Lib,[`$OTOOL -L conftest$ac_exeext | grep "ac_lib_pattern\\.[[0-9A-Za-z.]]*dylib" | sed -e "s/^.*\/\(ac_lib_pattern\.[[0-9A-Za-z.]]*dylib\).*$/\1/"';2,$d'`]) ;;
     *) AS_VAR_SET(ac_Lib,[`$READELF -d conftest$ac_exeext | grep "NEEDED.*ac_lib_pattern\\.$LIBEXT" | sed -e "s/^.*\\m4_dquote(\\(ac_lib_pattern\\.$LIBEXT[[^	 ]]*\\)\\).*$/\1/"';2,$d'`])
        AS_VAR_IF([ac_Lib],[],
              [AS_VAR_SET(ac_Lib,[`$LDD conftest$ac_exeext | grep "ac_lib_pattern\\.$LIBEXT" | sed -e "s/^.*\(ac_lib_pattern\.$LIBEXT[[^	 ]]*\).*$/\1/"';2,$d'`])]) ;;
-- 
2.4.5