libressl-cmake.sh: disable ASM for Windows ARM64

Turns out that the official Windows ARM64 curl.exe exited with an
assert when run with a simple command like: `curl https://example.org`.
```
Assertion failed: (i == BN_BITS2) || (h <= (BN_ULONG)1 << i), file \crypto\bn\bn_div.c, line 96
```
With asserts disabled the same command hung.

These warnings hinted to the problem:
```
In file included from libressl/crypto/bn/bn_add.c:65:
libressl/crypto/bn/arch/aarch64/bn_arch.h:35:16: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
   35 |             : [n]"=r"(n)
      |                       ^
libressl/crypto/bn/arch/aarch64/bn_arch.h:34:18: note: use constraint modifier "w"
   34 |         __asm__ ("clz   %[n], %[w]"
      |                         ^~~~
      |                         %w[n]
libressl/crypto/bn/arch/aarch64/bn_arch.h:36:15: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
   36 |             : [w]"r"(w));
      |                      ^
libressl/crypto/bn/arch/aarch64/bn_arch.h:34:24: note: use constraint modifier "w"
   34 |         __asm__ ("clz   %[n], %[w]"
      |                               ^~~~
      |                               %w[w]
libressl/crypto/bn/arch/aarch64/bn_arch.h:51:37: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
   51 |             : [carry]"=r"(carry), [r0]"=r"(r0)
      |                                            ^
[...]
```

autotools builds have ASM disabled by default for this build case.

Ref upstream PR disabling ASM for Windows ARM64 with CMake:
libressl/portable#989

_versions.sh

@@ -10,7 +10,7 @@ export CURL_HASH=42ab8db9e20d8290a3b633e7fbb3cec15db34df65fd1015ef8ac1e4723750ee
 # Create revision string
 # NOTE: Set _REV to 1 after bumping CURL_VER_, then increment for each
 #       CI rebuild via `main` branch push (e.g. after bumping a dependency).
-export _REV="${CW_REVISION:-3}"
+export _REV="${CW_REVISION:-4}"
 
 export TRURL_VER_='0.9'
 export TRURL_HASH=848da38c0ea07cd96d6adac4a5e5e141fe26e5bd846039aa350c3ca589a948e0

libressl-cmake.sh

@@ -25,6 +25,13 @@ _VER="$1"
     CPPFLAGS+=' -DNDEBUG'
   fi
 
+  # LibreSSL (as of v3.8.2) hangs with ASM enabled on Windows ARM64.
+  # It also results in long list of ASM warnings when -DNDEBUG is set.
+  # This is hidden by CMake which force-unsets -DNDEBUG.
+  if [ "${_OS}" = 'win' ] && [ "${_CPU}" = 'a64' ]; then
+    options+=' -DENABLE_ASM=OFF'
+  fi
+
   if [ "${_CC}" = 'llvm' ]; then
     CFLAGS+=' -Wa,--noexecstack'
   else

libressl-pkg.sh

@@ -4,8 +4,9 @@
 # SPDX-License-Identifier: MIT
 
 # Caveats (as of 3.8.2):
-# - ARM64 Windows builds exit with an assert.
+# - ARM64 Windows builds exit with an assert and hang with asserts disabled.
 #   https://github.com/libressl/portable/issues/987
+#   https://github.com/libressl/portable/pull/989
 # - CMake builds override -NDEBUG and do not allow building with this option.
 # - ASM support only for x64.
 # - ASM missing Intel CET support, resulting in linker warnings: