libgloss: Do not apply non-existent patch

When newlib and libgloss were updated to 4.3.0, SRC_URI was updated to
append a fix-rs6000-cflags.patch file when building on PowerPC, but this
file was not added to the repo.

Remove appending the missing patch.

(From OE-Core rev: 71231580e9e5d0060a0ea41d29152d43846a00f1)

Signed-off-by: Robert Joslyn <robert.joslyn@redrectangle.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 64561d8b81233a19df5f51d26dfbcd15835bec1f)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-core/newlib/libgloss_git.bb

@@ -6,7 +6,6 @@ FILESEXTRAPATHS:prepend := "${THISDIR}/libgloss:"
 
 SRC_URI:append = " file://libgloss-build-without-nostdinc.patch"
 SRC_URI:append:powerpc = " file://fix-rs6000-crt0.patch"
-SRC_URI:append:powerpc = " file://fix-rs6000-cflags.patch"
 
 do_configure() {
 	${S}/libgloss/configure ${EXTRA_OECONF}