This patch fixes toolchain-msvc.test on Windows ARM64 hosts running
under native ARM64 environment via vcvarsarm64.bat. Our lab buildbot
recently switched from using cross vcvarsamd64_arm64.bat environment to
native vcvarsarm64.bat. This patch updates FileCheck patterns to also
allow HostARM64 and arm64 PATH entries.
Changes:
-> Extend host regex to match HostARM64 (case-insensitive)
-> Allow arm64 in PATH tail.
-> Apply same fix in both 32-bit and 64-bit sections.
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