git-crypt: disable for gcc affected by bug #64735

git-crypt needs exception_ptr. gcc older than 7 don't provide that on
all architectures due to gcc bug #64735.

Fixes:
http://autobuild.buildroot.net/results/2a7/2a76ce39bc639b4f17ff33f8447d9094215e68d8/

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/git-crypt/Config.in

@@ -2,6 +2,7 @@ config BR2_PACKAGE_GIT_CRYPT
 	bool "git-crypt"
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # C++11
+	depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735 # exception_ptr
 	depends on BR2_USE_MMU # git
 	select BR2_PACKAGE_GIT # runtime
 	select BR2_PACKAGE_OPENSSL
@@ -15,3 +16,7 @@ comment "git-crypt needs a toolchain w/ C++, gcc >= 4.9"
 	depends on !BR2_INSTALL_LIBSTDCPP \
 		|| !BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
 	depends on BR2_USE_MMU
+
+comment "git-crypt needs a toolchain not affected by GCC bug 64735"
+	depends on BR2_USE_MMU
+	depends on BR2_TOOLCHAIN_HAS_GCC_BUG_64735