radare2: added patch for cross builds.

srcpkgs/radare2/patches/cross.patch

@@ -0,0 +1,22 @@
+--- shlr/Makefile.orig	2013-11-11 11:33:05.197480920 +0100
++++ shlr/Makefile	2013-11-11 11:33:14.263944850 +0100
+@@ -23,7 +23,7 @@ $(SDBLIB) sdb/sdb:
+ 	cd sdb ; ${MAKE} clean
+ 	cd sdb ; \
+ 		${MAKE} clean && \
+-		${MAKE} CC=${HOST_CC} && \
++		${MAKE} CC=${HOST_CC} CFLAGS="${HOST_CFLAGS}" && \
+ 		cp -f src/sdb src/.sdb
+ 	cd sdb ; ${MAKE} clean
+ 	cd sdb ; ${MAKE} src/sdb-version.h
+--- configure.orig	2013-11-11 11:39:27.476221882 +0100
++++ configure	2013-11-11 11:39:51.791056853 +0100
+@@ -36,7 +36,7 @@ while : ; do
+ ENVWORDS="${ENVWORDS} $1_CPU $1_OS"
+ STR=`eval "echo ${S}$1"`
+ SPLIT_CPU="`echo "$STR" | cut -d - -f 1`"
+-SPLIT_OS="`echo "$STR" | awk -F - '{if(NF==4){print $4}else{print $3}}'`"
++SPLIT_OS="`echo "$STR" | awk -F - '{if(NF==4){print $4}else{print $2}}'`"
+ eval "$1_CPU=\"$SPLIT_CPU\""
+ eval "$1_OS=\"$SPLIT_OS\""
+ shift