autotools: re-enable building om -- building it no longer intermittently crashes

Makefile.am

@@ -218,6 +218,7 @@ dictionaries: \
 	espeak-data/ne_dict \
 	espeak-data/nl_dict \
 	espeak-data/no_dict \
+	espeak-data/om_dict \
 	espeak-data/pa_dict \
 	espeak-data/pap_dict \
 	espeak-data/pl_dict \
@@ -496,6 +497,12 @@ dictsource/no_extra:
 espeak-data/no_dict: src/espeak espeak-data/phontab dictsource/no_list dictsource/no_rules dictsource/no_extra
 	cd dictsource && ESPEAK_DATA_PATH=$(PWD) LD_LIBRARY_PATH=../src:${LD_LIBRARY_PATH} ../src/espeak --compile=no && cd ..
 
+om: espeak-data/om_dict
+dictsource/om_extra:
+	touch dictsource/om_extra
+espeak-data/om_dict: src/espeak espeak-data/phontab dictsource/om_list dictsource/om_rules dictsource/om_extra
+	cd dictsource && ESPEAK_DATA_PATH=$(PWD) LD_LIBRARY_PATH=../src:${LD_LIBRARY_PATH} ../src/espeak --compile=om && cd ..
+
 pa: espeak-data/pa_dict
 dictsource/pa_extra:
 	touch dictsource/pa_extra

mkdictlist

@@ -16,8 +16,7 @@ special_voices = {
 	'zh-yue': 'zhy',
 }
 
-# The 'om' voice file intimitently crashes when compiling on some platforms.
-exclude_voices = ['om']
+exclude_voices = []
 
 def find_voices(path):
 	for filename in os.listdir(path):