icu: Upgrade 55.1 -> 56.1

Upgrade ICU from v55.1 to v56.1 and backport a later patch that is
necessary to avoid errors during the build.

(From OE-Core rev: 4a4af31a03bb9d83ee859f0f39a2bf416cf56915)

Signed-off-by: Mike Crowe <mac@mcrowe.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/icu/icu/icu-release-56-1-flagparser-fix.patch

@@ -0,0 +1,24 @@
+icu: Ticket #11959: pkgdata dies when compiled with lots'o'flags
+
+See: http://bugs.icu-project.org/trac/ticket/11959
+
+The patch avoids premature failure which results in a segfault.
+
+Upstream-Status: Backport of r38081
+Signed-off-by: Mike Crowe <mac@mcrowe.com>
+
+Index: source/tools/toolutil/flagparser.c
+===================================================================
+--- source/tools/toolutil/flagparser.c	(revision 38046)
++++ source/tools/toolutil/flagparser.c	(working copy)
+@@ -96,8 +96,8 @@
+     uprv_free(buffer);
+ 
+     T_FileStream_close(f);
+-    
+-    if (U_FAILURE(*status)) {
++
++    if (U_FAILURE(*status) && *status != U_BUFFER_OVERFLOW_ERROR) {
+         return -1;
+     }
+ 

meta/recipes-support/icu/icu_56.1.bb

@@ -16,11 +16,12 @@ BASE_SRC_URI = "http://download.icu-project.org/files/icu4c/${PV}/icu4c-${ICU_PV
 SRC_URI = "${BASE_SRC_URI} \
            file://icu-pkgdata-large-cmd.patch \
            file://fix-install-manx.patch \
+           file://icu-release-56-1-flagparser-fix.patch \
           "
 
 SRC_URI_append_class-target = "\
            file://0001-Disable-LDFLAGSICUDT-for-Linux.patch \
           "
-SRC_URI[md5sum] = "e2d523df79d6cb7855c2fbe284f4db29"
+SRC_URI[md5sum] = "c4a2d71ff56aec5ebfab2a3f059be99d"
-SRC_URI[sha256sum] = "e16b22cbefdd354bec114541f7849a12f8fc2015320ca5282ee4fd787571457b"
+SRC_URI[sha256sum] = "3a64e9105c734dcf631c0b3ed60404531bce6c0f5a64bfe1a6402a4cc2314816"