meta-oe: repair broken recipe upstream version-checks

A full check-upgrade-status sweep of meta-oe found 121 recipes reporting
UNKNOWN_BROKEN: their upstream version check resolved no version. This
adds the correct check metadata to each so the version check works again.

Fixes, by mechanism:
 - wget/tarball recipes: add UPSTREAM_CHECK_URI + UPSTREAM_CHECK_REGEX
   pointing at the real release listing (SourceForge files pages, GitHub
   releases pages, GNU/ftp mirrors, distro pools).
 - git recipes with release tags in a non-default format: add
   UPSTREAM_CHECK_GITTAGREGEX matching the actual tag scheme.
 - git repos with no tags at all: UPSTREAM_CHECK_COMMITS = "1".
 - recipes whose upstream has no checkable release channel, or whose PV
   format cannot be compared against upstream tags (CPAN zero-padded
   versions, AUTOINC "git" PVs, dash-separated tags the checker cannot
   convert): UPSTREAM_VERSION_UNKNOWN = "1" with an explanatory comment.

Also override GITHUB_BASE_URI for libppd's sibling libcupsfilters where the
github-releases class default pointed at a non-existent org (404).

Only version-check metadata is touched; no SRC_URI, SRCREV, PV, or checksum
is changed, so nothing that gets built is affected. Each fix was verified
with devtool check-upgrade-status: 120 of 121 now resolve (MATCH, UPDATE,
COMMITS, or an honestly-declared UNKNOWN). The remaining recipe (libubox)
already has correct metadata and only fails locally because the git://
port to git.openwrt.org is firewalled on the build host.

Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-oe/recipes-devtools/cppgenerate/cppgenerate_0.3.bb

@@ -9,6 +9,10 @@ SRC_URI = "git://github.com/rm5248/libcppgenerate.git;branch=master;protocol=htt
 
 SRCREV = "930c5503f76c877b72b9ff8546353d6f422bd010"
 
+# Upstream stopped tagging after cppgenerate-0.2; PV 0.3 comes from the version
+# in master's CMakeLists.txt, so tags can only ever look like a downgrade.
+UPSTREAM_CHECK_COMMITS = "1"
+
 inherit cmake
 
 BBCLASSEXTEND = "native nativesdk"