Bump Buildroot Version to buildroot 2019_02_6

bsp/buildroot/package/ffmpeg/Config.in

@@ -7,8 +7,6 @@ config BR2_PACKAGE_FFMPEG_ARCH_SUPPORTS
 	depends on !BR2_nios2
 	# No support for ARMv7-M in the ARM assembly logic
 	depends on !BR2_ARM_CPU_ARMV7M
-	# Microblaze build affected by gcc PR71124 (infinite loop)
-	depends on !BR2_microblaze
 	# m68k coldfire causes a build failure, because the check for
 	# atomics (atomic_store) succeeds, which causes ffmpeg to
 	# think atomic intrinsics are available, while they are

bsp/buildroot/package/ffmpeg/ffmpeg.hash

@@ -1,5 +1,5 @@
 # Locally calculated
-sha256 741cbd6394eaed370774ca4cc089eaafbc54d0824b9aa360d4b3b0cbcbc4a92c  ffmpeg-3.4.5.tar.xz
+sha256 3572279cb139d9e39dcfbc23edf438ff5311ec3fc5d0dcb3558e49591e5cb83e  ffmpeg-3.4.6.tar.xz
 sha256 8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643  COPYING.GPLv2
 sha256 b634ab5640e258563c536e658cad87080553df6f34f62269a21d554844e58bfe  COPYING.LGPLv2.1
 sha256 73d99bc83313fff665b426d6672b4e0479102bc402fe22314ac9ce94a38aa5ff  LICENSE.md

bsp/buildroot/package/ffmpeg/ffmpeg.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-FFMPEG_VERSION = 3.4.5
+FFMPEG_VERSION = 3.4.6
 FFMPEG_SOURCE = ffmpeg-$(FFMPEG_VERSION).tar.xz
 FFMPEG_SITE = http://ffmpeg.org/releases
 FFMPEG_INSTALL_STAGING = YES
@@ -517,6 +517,14 @@ else ifneq ($(GCC_TARGET_ARCH),)
 FFMPEG_CONF_OPTS += --cpu="$(GCC_TARGET_ARCH)"
 endif
 
+FFMPEG_CFLAGS = $(TARGET_CFLAGS)
+
+ifeq ($(BR2_TOOLCHAIN_HAS_GCC_BUG_85180),y)
+FFMPEG_CONF_OPTS += --disable-optimizations
+FFMPEG_CFLAGS += -O0
+endif
+
+FFMPEG_CONF_ENV += CFLAGS="$(FFMPEG_CFLAGS)"
 FFMPEG_CONF_OPTS += $(call qstrip,$(BR2_PACKAGE_FFMPEG_EXTRACONF))
 
 # Override FFMPEG_CONFIGURE_CMDS: FFmpeg does not support --target and others