icu: fix cross build

srcpkgs/icu/patches/buffer_size_adjust.patch

@@ -0,0 +1,21 @@
+The value of tmpResult may be -1 in which case setting
+currentBufferSize = -1 leads to an error when trying to
+allocate the buffers.
+
+If tmpResult is less than currentBufferSize simply double
+currentBufferSize until parsing the flags succeeds.
+
+--- source/tools/pkgdata/pkgdata.cpp	2015-10-08 05:54:02.000000000 +0200
++++ source/tools/pkgdata/pkgdata.cpp	2015-11-29 16:52:09.329794090 +0100
+@@ -862,7 +862,10 @@
+                     pkgDataFlags[i] = NULL;
+                 }
+             }
+-            currentBufferSize = tmpResult;
++            if (tmpResult > currentBufferSize)
++                currentBufferSize = tmpResult;
++            else
++                currentBufferSize *= 2;
+         } else if (U_FAILURE(status)) {
+             fprintf(stderr,"Unable to open or read \"%s\" option file. status = %s\n", o->options, u_errorName(status));
+             return -1;

srcpkgs/icu/template

@@ -1,7 +1,7 @@
 # Template build file for 'icu'.
 pkgname=icu
 version=56.1
-revision=1
+revision=2
 wrksrc=icu
 build_wrksrc=source
 build_style=gnu-configure
@@ -13,8 +13,6 @@ license="ICU License /usr/share/licenses/icu/license.html"
 distfiles="http://download.icu-project.org/files/icu4c/${version}/icu4c-${version//./_}-src.tgz"
 checksum=3a64e9105c734dcf631c0b3ed60404531bce6c0f5a64bfe1a6402a4cc2314816
 
-nocross=yes
-
 if [ "$CROSS_BUILD" ]; then
 	configure_args+=" --with-cross-build=${XBPS_BUILDDIR}/${wrksrc}/host-icu"
 fi