Move oniguruma and decNumber to vendor directory (#3234)

Makefile.am

@@ -5,16 +5,16 @@ LIBJQ_INCS = src/builtin.h src/bytecode.h src/compile.h                 \
         src/exec_stack.h src/jq_parser.h src/jv_alloc.h src/jv_dtoa.h   \
         src/jv_unicode.h src/jv_utf8_tables.h src/lexer.l src/libm.h    \
         src/linker.h src/locfile.h src/opcode_list.h src/parser.y       \
-        src/util.h src/decNumber/decContext.h src/decNumber/decNumber.h \
-        src/decNumber/decNumberLocal.h src/jv_dtoa_tsd.h src/jv_thread.h \
-        src/jv_private.h
+        src/util.h src/jv_dtoa_tsd.h src/jv_thread.h src/jv_private.h   \
+        vendor/decNumber/decContext.h vendor/decNumber/decNumber.h      \
+        vendor/decNumber/decNumberLocal.h
 
 LIBJQ_SRC = src/builtin.c src/bytecode.c src/compile.c src/execute.c    \
         src/jq_test.c src/jv.c src/jv_alloc.c src/jv_aux.c              \
         src/jv_dtoa.c src/jv_file.c src/jv_parse.c src/jv_print.c       \
         src/jv_unicode.c src/linker.c src/locfile.c src/util.c          \
-        src/decNumber/decContext.c src/decNumber/decNumber.c            \
         src/jv_dtoa_tsd.c                                               \
+        vendor/decNumber/decContext.c vendor/decNumber/decNumber.c      \
         ${LIBJQ_INCS}
 
 ### C build options
@@ -69,7 +69,7 @@ if ENABLE_UBSAN
 AM_CFLAGS += -fsanitize=undefined
 endif
 
-AM_CPPFLAGS = -I$(srcdir)/src
+AM_CPPFLAGS = -I$(srcdir)/src -I$(srcdir)/vendor
 
 ### Running tests under Valgrind
 
@@ -176,8 +176,8 @@ CLEANFILES += jq.1
 ### Build oniguruma
 
 if BUILD_ONIGURUMA
-libjq_la_LIBADD += modules/oniguruma/src/.libs/libonig.la
-SUBDIRS = modules/oniguruma
+libjq_la_LIBADD += vendor/oniguruma/src/.libs/libonig.la
+SUBDIRS = vendor/oniguruma
 endif
 
 AM_CFLAGS += $(onig_CFLAGS)