libjpeg: import from oldpackages, add myself as maintainer, add fix for CVE-2013-6629, change PKG_LICENSE to SPDX identifier

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

libs/libjpeg/patches/001-allow-ccache.patch

@@ -0,0 +1,11 @@
+--- a/makefile.cfg
++++ b/makefile.cfg
+@@ -168,7 +168,7 @@ libjpeg.a: @A2K_DEPS@ $(LIBOBJECTS)
+ 
+ # with libtool:
+ libjpeg.la: @A2K_DEPS@ $(LIBOBJECTS)
+-	$(LIBTOOL) --mode=link $(CC) -o libjpeg.la $(LIBOBJECTS) \
++	$(LIBTOOL) --mode=link "$(CC)" -o libjpeg.la $(LIBOBJECTS) \
+ 		-rpath $(libdir) -version-info $(JPEG_LIB_VERSION)
+ 
+ # sample programs:

libs/libjpeg/patches/300-CVE-2013-6629.patch

@@ -0,0 +1,15 @@
+--- a/jdmarker.c
++++ b/jdmarker.c
+@@ -342,6 +342,12 @@ get_sos (j_decompress_ptr cinfo)
+     
+     TRACEMS3(cinfo, 1, JTRC_SOS_COMPONENT, cc,
+ 	     compptr->dc_tbl_no, compptr->ac_tbl_no);
++
++    /* This CSi (cc) should differ from the previous CSi */
++    for (ci = 0; ci < i; ci++) {
++      if (cinfo->cur_comp_info[ci] == compptr)
++        ERREXIT1(cinfo, JERR_BAD_COMPONENT_ID, cc);
++    }
+   }
+ 
+   /* Collect the additional scan parameters Ss, Se, Ah/Al. */