procdump 2.2-1ubuntu1 FTBFS on armhf

[Benjamin Drung]

procdump 2.2-1ubuntu1 fails to build on armhf:

```
dh clean --no-parallel
   dh_auto_clean -O--no-parallel
 make -j1 distclean
make[1]: Entering directory '/<<PKGBUILDDIR>>'
Makefile:31: *** recipe commences before first target. Stop.
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
```

This failure is caused by failing to detect the architecture:

```
$ uname -p
armv7l
```

When adding armv7l to the list of ARM architectures, the build will fail with:

```
clang++ -o obj/ProcDumpProfiler.so -DELPP_NO_DEFAULT_LOG_FILE -DELPP_THREAD_SAFE -g -pthread -shared --no-undefined -Wno-invalid-noreturn -Wno-pragma-pack -Wno-writable-strings -Wno-format-security -fPIC -fms-extensions -DHOST_ARM -DPAL_STDCPP_COMPAT -DPLATFORM_UNIX -std=c++11 -I profiler/inc -I include profiler/src/ClassFactory.cpp profiler/src/ProcDumpProfiler.cpp profiler/src/dllmain.cpp profiler/src/corprof_i.cpp profiler/src/easylogging++.cc
profiler/src/ProcDumpProfiler.cpp:406:33: warning: implicit conversion of NULL constant to 'ObjectID' (aka 'unsigned int') [-Wnull-conversion]
  406 | entry.exceptionID = NULL;
      | ~ ^~~~
      | 0
profiler/src/ProcDumpProfiler.cpp:1130:29: warning: implicit conversion of NULL constant to 'ClassID' (aka 'unsigned int') [-Wnull-conversion]
 1130 | ClassID parentClassId = NULL;
      | ~~~~~~~~~~~~~ ^~~~
      | 0
profiler/src/ProcDumpProfiler.cpp:1131:38: warning: implicit conversion of NULL constant to 'ClassID' (aka 'unsigned int') [-Wnull-conversion]
 1131 | ClassID systemExceptionClassId = NULL;
      | ~~~~~~~~~~~~~~~~~~~~~~ ^~~~
      | 0
profiler/src/ProcDumpProfiler.cpp:1192:26: warning: comparison between NULL and non-pointer ('ClassID' (aka 'unsigned int') and NULL) [-Wnull-arithmetic]
 1192 | }while(parentClassId != NULL);
      | ~~~~~~~~~~~~~ ^ ~~~~
profiler/src/ProcDumpProfiler.cpp:1194:31: warning: comparison between NULL and non-pointer ('ClassID' (aka 'unsigned int') and NULL) [-Wnull-arithmetic]
 1194 | if(systemExceptionClassId != NULL)
      | ~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~
profiler/src/ProcDumpProfiler.cpp:1255:30: error: use of undeclared identifier 'PLONG_PTR'
 1255 | msgField = *(PLONG_PTR)(((BYTE *)objectId) + pFieldOffsets[fieldIndex].ulOffset);
      | ^
profiler/src/ProcDumpProfiler.cpp:1256:29: warning: comparison between NULL and non-pointer ('LONG_PTR' (aka 'int') and NULL) [-Wnull-arithmetic]
 1256 | if(msgField != NULL)
      | ~~~~~~~~ ^ ~~~~
6 warnings and 1 error generated.
make[1]: *** [Makefile:87: obj/ProcDumpProfiler.so] Error 1
```

Full log: https://launchpadlibrarian.net/732723704/buildlog_ubuntu-oracular-armhf.procdump_2.2-1ubuntu2~ppa3_BUILDING.txt.gz

[Benjamin Drung (bdrung)]

Forwarded armv7l detection fix: https://github.com/Sysinternals/ProcDump-for-Linux/pull/252

[Benjamin Drung (bdrung)]

Pushed this backported armv7l detection patch to https://code.launchpad.net/~bdrung/ubuntu/+source/procdump/+git/procdump/+ref/ubuntu/devel