src/Makefile.am: Don't make 'install' depend on 'all'.

This fixes the issue where installing will re-generate
the voices and may sometimes fail setting up the
shadow directories in the espeak-data folder.

Makefile.am

@@ -25,7 +25,7 @@ EXTRA_DIST += ChangeLog
 
 all: src/speak src/libespeak.so src/libespeak.a src/espeak src/espeakedit espeak-data/phontab dictionaries docs/speak_lib.h
 
-install: all
+install:
 	cd src && make DESTDIR=$(DESTDIR) PREFIX=$(PREFIX) BINDIR=$(BINDIR) INCDIR=$(INCDIR) LIBDIR=$(LIBDIR) install && cd ..
 	install -m 755 src/espeakedit $(DESTDIR)$(BINDIR)
 

src/Makefile.am

@@ -135,7 +135,7 @@ distclean: clean
 	rm -f $(STATIC_LIBESPEAK)
 	rm -f $(ESPEAKEDIT)
 
-install: all
+install:
 	rm -rf $(DESTDIR)$(DATADIR)
 	$(MKDIR) $(DESTDIR)$(BINDIR)
 	$(MKDIR) $(DESTDIR)$(LIBDIR)