Bump buildroot to 2019.02

bsp/buildroot/support/dependencies/dependencies.mk

@@ -5,6 +5,11 @@
 #
 ################################################################################
 
+ifeq ($(BR2_FORCE_HOST_BUILD),y)
+# ignore all available host packages
+define suitable-host-package
+endef
+else
 # suitable-host-pkg: calls check-host-$(1).sh shell script. Parameter (2)
 # can be the candidate to be checked. If not present, the check-host-$(1).sh
 # script should use 'which' to find a candidate. The script should return
@@ -12,28 +17,19 @@
 define suitable-host-package
 $(shell support/dependencies/check-host-$(1).sh $(2))
 endef
+endif
 # host utilities needs host-tar to extract the source code tarballs, so
 # ensure check-host-tar.mk is included before the rest
 include support/dependencies/check-host-tar.mk
 -include $(sort $(filter-out %-tar.mk,$(wildcard support/dependencies/check-host-*.mk)))
 
-ifeq ($(BR2_CCACHE),y)
-DEPENDENCIES_HOST_PREREQ += host-ccache
-endif
-
-core-dependencies:
+dependencies:
 	@MAKE="$(MAKE)" DL_TOOLS="$(sort $(DL_TOOLS_DEPENDENCIES))" \
 		$(TOPDIR)/support/dependencies/dependencies.sh
 
-$(DEPENDENCIES_HOST_PREREQ): HOSTCC=$(HOSTCC_NOCCACHE)
-$(DEPENDENCIES_HOST_PREREQ): HOSTCXX=$(HOSTCXX_NOCCACHE)
-$(DEPENDENCIES_HOST_PREREQ): core-dependencies
-
-dependencies: core-dependencies $(DEPENDENCIES_HOST_PREREQ)
-
 ################################################################################
 #
 # Toplevel Makefile options
 #
 ################################################################################
-.PHONY: dependencies core-dependencies
+.PHONY: dependencies