libdca: enable shared build

Signed-off-by: Timothy Gu <timothygu99@gmail.com>

src/libdca.mk

@@ -17,10 +17,7 @@ endef
 
 define $(PKG)_BUILD
     cd '$(1)' && ./configure \
-        --host='$(TARGET)' \
-        --enable-static \
-        --disable-shared \
-        --prefix='$(PREFIX)/$(TARGET)'
+        $(MXE_CONFIGURE_OPTS)
     $(MAKE) -C '$(1)' -j '$(JOBS)' bin_PROGRAMS= sbin_PROGRAMS= noinst_PROGRAMS=
     $(MAKE) -C '$(1)' -j 1 install bin_PROGRAMS= sbin_PROGRAMS= noinst_PROGRAMS=
 
@@ -29,5 +26,3 @@ define $(PKG)_BUILD
         '$(2).c' -o '$(PREFIX)/$(TARGET)/bin/test-libdca.exe' \
         `'$(TARGET)-pkg-config' libdca --cflags --libs`
 endef
-
-$(PKG)_BUILD_SHARED =