capnproto: upgrade 1.4.0 -> 1.5.0

Cap'n Proto 1.5.0 is primarily a KJ-HTTP security release.  It hardens
the plain-HTTP serialization path against request smuggling / HTTP
desync: serializeRequest/serializeConnectRequest now reject request
targets containing whitespace or control characters and serializeResponse
rejects status text containing CR, LF or NUL (GHSL-2026-146, reported by
Kevin Stubbings), and the header parser no longer accepts whitespace
between a field name and the colon.  It also picks up compatibility
fixes: builds against OpenSSL 4.0 while remaining compatible with older
OpenSSL, Bazel 9 support, boringssl Bzlmod repo_name, an MSVC build fix,
tolerating ERROR_INVALID_FUNCTION from GetFileInformationByHandleEx under
Wine, replacing the c++/LICENSE.txt symlink with a real file, and
scoping CTest to the project.  LICENSE is unchanged and
0001-Export-binaries-only-for-native-build.patch still applies cleanly.

AI-Generated: Uses Claude Code
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-oe/recipes-devtools/capnproto/capnproto_1.5.0.bb

@@ -7,7 +7,7 @@ LIC_FILES_CHKSUM = "file://../LICENSE;md5=a05663ae6cca874123bf667a60dca8c9"
 
 SRC_URI = "git://github.com/sandstorm-io/capnproto.git;branch=release-${PV};protocol=https;tag=v${PV} \
            file://0001-Export-binaries-only-for-native-build.patch"
-SRCREV = "8b892a8a11a632f5d52b877a49728808a142379a"
+SRCREV = "373e61ec89e2359f1c362e9b2eadc552f4779306"
 
 S = "${UNPACKDIR}/${BP}/c++"