Bump buidlroot version to 2018.02.6

bsp/buildroot/package/lua/5.2.4/0004-lua-pc.patch

@@ -1,42 +0,0 @@
-add lua.pc
-
-Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
-[Jörg Krause: add @MYLIBS@]
-Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
-
-Index: b/etc/lua.pc
-===================================================================
---- /dev/null
-+++ b/etc/lua.pc
-@@ -0,0 +1,31 @@
-+# lua.pc -- pkg-config data for Lua
-+
-+# vars from install Makefile
-+
-+# grep '^V=' ../Makefile
-+V= 5.2
-+# grep '^R=' ../Makefile
-+R= 5.2.3
-+
-+# grep '^INSTALL_.*=' ../Makefile | sed 's/INSTALL_TOP/prefix/'
-+prefix= /usr
-+INSTALL_BIN= ${prefix}/bin
-+INSTALL_INC= ${prefix}/include
-+INSTALL_LIB= ${prefix}/lib
-+INSTALL_MAN= ${prefix}/man/man1
-+INSTALL_LMOD= ${prefix}/share/lua/${V}
-+INSTALL_CMOD= ${prefix}/lib/lua/${V}
-+
-+# canonical vars
-+exec_prefix=${prefix}
-+libdir=${exec_prefix}/lib
-+includedir=${prefix}/include
-+
-+Name: Lua
-+Description: An Extensible Extension Language
-+Version: ${R}
-+Requires: 
-+Libs: -L${libdir} -llua -lm @MYLIBS@
-+Cflags: -I${includedir}
-+
-+# (end of lua.pc)