xgettext: Refactor.
* gettext-tools/src/x-awk.c (SE_QUOTES): Renamed from P7_QUOTES.
(get_string_element): Renamed from phase7_getc.
(x_awk_lex): Update.
* gettext-tools/src/x-c.c (SE_EOF): Renamed from P7_EOF.
(SE_QUOTES): Renamed from P7_QUOTES.
(SE_QUOTE): Renamed from P7_QUOTE.
(SE_NEWLINE): Renamed from P7_NEWLINE.
(get_string_element): Renamed from phase7_getc.
(unget_string_element): Renamed from phase7_ungetc.
(phase5_get): Update.
* gettext-tools/src/x-vala.c (SE_EOF): Renamed from P7_EOF.
(SE_QUOTES): Renamed from P7_QUOTES.
(SE_QUOTE): Renamed from P7_QUOTE.
(SE_NEWLINE): Renamed from P7_NEWLINE.
(get_string_element): Renamed from phase7_getc.
(unget_string_element): Renamed from phase7_ungetc.
(phase3_get): Update.
* gettext-tools/src/x-ycp.c (SE_QUOTES): Renamed from P7_QUOTES.
(get_string_element): Renamed from phase7_getc.
(phase5_get): Update.
