m4: Update ax_python_devel.m4

[Hains]

Copy from:
https://github.com/oe-alliance/AutoBouquetsMaker/blob/master/m4/ax_python_devel.m4

[WanWizard]

Another one of those OE-A changes we can't simply copy?

| checking consistency of all components of python development environment... no
| configure: WARNING:
|   Could not link test program to Python. Maybe the main Python library has been
|   installed in some non-standard library path. If so, pass it to configure,
|   via the LIBS environment variable.
|   Example: ./configure LIBS="-L/usr/non-standard-path/python/lib"
|   ============================================================================
|    ERROR!
|    You probably have to install the development version of the Python package
|    for your distribution.  The exact name of this package varies among them.
|   ============================================================================
| 
| configure: error: Giving up
| NOTE: The following config.log files may provide further information.
| NOTE: /data/openpli/pli-oe/develop/build/tmp/work/armv7ahf-neon-oe-linux-gnueabi/enigma2-plugins/gitAUTOINC+cbd6db927d-r0/git/config.log
| ERROR: configure failed
| WARNING: /data/openpli/pli-oe/develop/build/tmp/work/armv7ahf-neon-oe-linux-gnueabi/enigma2-plugins/gitAUTOINC+cbd6db927d-r0/temp/run.do_configure.131137:292 exit 1 from 'exit 1'
| WARNING: Backtrace (BB generated script):
| 	#1: bbfatal_log, /data/openpli/pli-oe/develop/build/tmp/work/armv7ahf-neon-oe-linux-gnueabi/enigma2-plugins/gitAUTOINC+cbd6db927d-r0/temp/run.do_configure.131137, line 292
| 	#2: oe_runconf, /data/openpli/pli-oe/develop/build/tmp/work/armv7ahf-neon-oe-linux-gnueabi/enigma2-plugins/gitAUTOINC+cbd6db927d-r0/temp/run.do_configure.131137, line 254
| 	#3: autotools_do_configure, /data/openpli/pli-oe/develop/build/tmp/work/armv7ahf-neon-oe-linux-gnueabi/enigma2-plugins/gitAUTOINC+cbd6db927d-r0/temp/run.do_configure.131137, line 238
| 	#4: do_configure, /data/openpli/pli-oe/develop/build/tmp/work/armv7ahf-neon-oe-linux-gnueabi/enigma2-plugins/gitAUTOINC+cbd6db927d-r0/temp/run.do_configure.131137, line 158
| 	#5: main, /data/openpli/pli-oe/develop/build/tmp/work/armv7ahf-neon-oe-linux-gnueabi/enigma2-plugins/gitAUTOINC+cbd6db927d-r0/temp/run.do_configure.131137, line 296
| ERROR: ExecutionError('/data/openpli/pli-oe/develop/build/tmp/work/armv7ahf-neon-oe-linux-gnueabi/enigma2-plugins/gitAUTOINC+cbd6db927d-r0/temp/run.do_configure.131137', 1, None, None)