libsoc: strip trailing newline

Missing from previous commit.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/libsoc/libsoc.mk

@@ -12,4 +12,3 @@ LIBSOC_AUTORECONF = YES
 LIBSOC_INSTALL_STAGING = YES
 
 $(eval $(autotools-package))
-