some missing icons

- when using symbolic for HC

https://bugzilla.gnome.org/show_bug.cgi?id=732511
src/spinner/Makefile.am: missing \ at end of lines breaks jhbuild

When building adwaita-icon-themes with jhbuild (master; on Ubuntu 14.04), the build fails with

make[2]: Entering directory `/home/pietro/jhbuild/checkout/adwaita-icon-theme/src/spinner'
for file in ; do \
                size='scalable-up-to-32'
/bin/bash: -c: line 2: syntax error: unexpected end of file
make[2]: *** [render-png] Error 1
make[2]: git.mk: Generating .gitignore
*** Waiting for unfinished jobs....
make[2]: Leaving directory `/home/pietro/jhbuild/checkout/adwaita-icon-theme/src/spinner'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/pietro/jhbuild/checkout/adwaita-icon-theme/src'
make: *** [all-recursive] Error 1
*** Error during phase build of adwaita-icon-theme: ########## Error running make -j 3 *** [29/29]

The problem is obvious: a line (actually two) of the Makefile.am is/are missing \ at the end.

The attached patch will fix the issue.

https://bugzilla.gnome.org/show_bug.cgi?id=734456