Fix googletest to build with gcc 11.1

Googletest doesn't compile with gcc 11.1 because it doesn't explicitly
include <string> -- this is included implicitly (dependency of other
headers) by older libstdc++ as well as libc++

Signed-off-by: Bernhard Rosenkränzer <bernhard.rosenkraenzer.ext@huawei.com>

meta-ohos-acts/recipes-ohos-googletest/ohos-googletest/ohos-googletest/googletest-gcc-11.patch

+diff -up git/googletest/include/gtest/hwext/gtest-tag.h.omv~ git/googletest/include/gtest/hwext/gtest-tag.h
+--- git/googletest/include/gtest/hwext/gtest-tag.h.omv~	2021-07-06 19:01:12.828013607 +0200
++++ git/googletest/include/gtest/hwext/gtest-tag.h	2021-07-06 19:01:24.291492486 +0200
+@@ -3,7 +3,8 @@
+ #ifndef GTEST_INCLUDE_GTEST_GTEST_TAG_H_
+ #define GTEST_INCLUDE_GTEST_GTEST_TAG_H_
+ 
+-#include <string.h>
++#include <string>
++#include <cstring>
+ #include <map>
+ #include <vector>
+ 

meta-ohos-acts/recipes-ohos-googletest/ohos-googletest/ohos-googletest_git.bb

@@ -8,7 +8,8 @@ LIC_FILES_CHKSUM = "file://LICENSE;md5=cbbd27594afd089daa160d3a16dd515a \
                     file://googlemock/scripts/generator/LICENSE;md5=2c0b90db7465231447cf2dd2e8163333 \
                     file://googletest/LICENSE;md5=cbbd27594afd089daa160d3a16dd515a"
 
-SRC_URI = "git://git.ostc-eu.org/OSTC/OHOS/components/staging/third_party_googletest.git;protocol=https;branch=ostc-next"
+SRC_URI = "git://git.ostc-eu.org/OSTC/OHOS/components/staging/third_party_googletest.git;protocol=https;branch=ostc-next \
+file://googletest-gcc-11.patch"
 SRCREV = "54337710388898ae818bbc2c0e0457c9b86e335e"
 S = "${WORKDIR}/git"
 PV = "0.0+git${SRCPV}"