extras/Makefile.am: fix libwebpextras.la reference
drop './' from the reference in webp_quality_LDADD.. this form is used
in the other makefiles. this fixes a parallel build failure seen under
freebsd:
make[1]: don't know how to make ./libwebpextras.la. Stop
@@ -22,5 +22,5 @@ get_disto_LDADD += $(PNG_LIBS) $(JPEG_LIBS) $(TIFF_LIBS)
webp_quality_SOURCES = webp_quality.c
webp_quality_CPPFLAGS = $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE)
webp_quality_LDADD = ../imageio/libimageio_util.la
-webp_quality_LDADD += ./libwebpextras.la
+webp_quality_LDADD += libwebpextras.la
webp_quality_LDADD += ../src/libwebp.la
