package/boost: drop spurious spaces

Drop spurious spaces added by commit
581af082c517f77bb998da318a216ecef60480e4

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/boost/boost.mk

@@ -92,10 +92,10 @@ BOOST_ABI = sysv
 endif
 
 BOOST_OPTS += --no-cmake-config \
-	     toolset=gcc \
-	     threading=multi \
-	     abi=$(BOOST_ABI) \
-	     variant=$(if $(BR2_ENABLE_RUNTIME_DEBUG),debug,release)
+	toolset=gcc \
+	threading=multi \
+	abi=$(BOOST_ABI) \
+	variant=$(if $(BR2_ENABLE_RUNTIME_DEBUG),debug,release)
 
 ifeq ($(BR2_sparc64),y)
 BOOST_OPTS += architecture=sparc instruction-set=ultrasparc