update boost to latest stable version

package/boost/Makefile

@@ -4,10 +4,10 @@
 include ${ADK_TOPDIR}/rules.mk
 
 PKG_NAME:=		boost
-PKG_VERSION:=		1.57.0
-PKG_EXTRAVER:=		1_57
+PKG_VERSION:=		1.58.0
+PKG_EXTRAVER:=		1_58
 PKG_RELEASE:=		1
-PKG_HASH:=		fea9c7472f7a52cec2a1640958145b2144bf17903a21db65b95efb6ae5817fa5
+PKG_HASH:=		a004d9b3fa95e956383693b86fce1b68805a6f71c2e68944fa813de0fb8c8102
 PKG_DESCR:=		portable c++ library
 PKG_SECTION:=		libs/misc
 PKG_BUILDDEP:=		python2-host