common/build-style/cmake.sh: strip -pipe if present in C(XX)FLAGS

Reason: https://gitlab.kitware.com/cmake/cmake/issues/19590

Our workaround within cmake is not sufficient as it does not
address the issue fully and things still break sometimes. So
work around this in the build-style for the time being (and
drop the cmake patch).

Once this is fixed upstream (probably needs special casing
for the -pipe flag and strip it during compile tests) we
can drop this.

common/build-style/cmake.sh

@@ -57,8 +57,10 @@ _EOF
 
 	cmake_args+=" -DCMAKE_INSTALL_SBINDIR=bin"
 
-	cmake ${cmake_args} ${configure_args} $(echo ${cmake_builddir}|sed \
-		-e 's|[^/]$|/|' -e 's|[^/]*||g' -e 's|/|../|g')
+	# Override flags: https://gitlab.kitware.com/cmake/cmake/issues/19590
+	CFLAGS="${CFLAGS/ -pipe / }" CXXFLAGS="${CXXFLAGS/ -pipe / }" \
+		cmake ${cmake_args} ${configure_args} $(echo ${cmake_builddir}|sed \
+			-e 's|[^/]$|/|' -e 's|[^/]*||g' -e 's|/|../|g')
 
 	# Replace -isystem with -I for Qt4 and Qt5 packages
 	find -name flags.make -exec sed -i "{}" -e"s;-isystem;-I;g" \;