Support extractcode on Apple ARM chip nexB#2835

This commit carries over a patch applied to the scancode and configure
scripts to ensure that extractcode can work correctly in X86 emulated
mode on Apple ARM silicon,

* Only relaunch extractcode when not in emulation mode
Running `uname -m` on Apple silicon machines always results in `arm64`,
regardless if Bash is running in Rosetta 2 emulation or natively. Check
if extractcode is running in emulation mode (see [1]), before
relaunching it, to avoid an infinite loop.

*Pass all parameters to the relaunched shell
Calling `bash -c` with `$@` results in only the first parameter being
passed to the subshell. Use `$*` to ensure all parameters are correctly
passed to the Rosetta 2 emulated subshell.

[1]: https://developer.apple.com/documentation/apple-silicon/about-the-rosetta-translation-environment

Reported-by: Marcel Bochtler <git@bochtler.io>
Authored-by: Marcel Bochtler <git@bochtler.io>
Signed-off-by: Philippe Ombredanne <pombredanne@nexb.com>

Author: pombredanne

extractcode

@@ -121,8 +121,8 @@ SCANCODE_BIN="$( realpath "${BASH_SOURCE[0]}" )"
 SCANCODE_ROOT_DIR="$( cd "$( dirname "${SCANCODE_BIN}" )" && pwd )"
 
 # force relaunching under X86-64 architecture on macOS M1/ARM 
-if [[ $OSTYPE == 'darwin'* && $(uname -m) == 'arm64' ]]; then
-    arch -x86_64 /bin/bash -c "$SCANCODE_ROOT_DIR/$COMMAND_TO_RUN $@"
+if [[ $OSTYPE == 'darwin'* && $(uname -m) == 'arm64' && $(sysctl -in sysctl.proc_translated) == 0 ]]; then
+    arch -x86_64 /bin/bash -c "$SCANCODE_ROOT_DIR/$COMMAND_TO_RUN $*"
     exit $?
 fi