Merge build_darwin_arm64.sh and build_darwin_arm64.sh

[fmarier]

Once #155 and #156 are resolved, the two build scripts will be identical.

At the moment, the only differences are:

--- build_darwin_arm64.sh	2025-10-02 11:07:02.779859613 -0700
+++ build_darwin_x86_64.sh	2025-10-02 11:42:00.835147638 -0700
@@ -1,7 +1,7 @@
 #!/bin/sh -eu
 
-BUILD_CPU=arm64
-BUILD_HOST=arm-apple-darwin
+BUILD_CPU=x86_64
+BUILD_HOST=x86_64
 
 echo "running build_darwin_$BUILD_CPU.sh..."
 
@@ -78,7 +78,7 @@
   --host=$BUILD_HOST \
   --disable-clock-gettime \
   --with-pic
-make ${jobs:+-j${jobs}} && make ${jobs:+-j${jobs}} check && make install
+make ${jobs:+-j${jobs}} && make install
 cd ../../
 
 tar -xvzf "tor-$TOR_VERSION.tar.gz" -C $BUILD_CPU
@@ -105,5 +105,5 @@
   --disable-tool-name-check \
   ac_cv_func_getentropy=no \
   ac_cv_func_clock_gettime=no
-make ${jobs:+-j${jobs}} && make install
+make ${jobs:+-j${jobs}} && make ${jobs:+-j${jobs}} check && make install
 cd ../../

[fmarier]

We also need to resolve #165.