!40 modify zlib to shared to reduce process memory

Merge pull request !40 from SoftSquirrel/master

BUILD.gn

@@ -55,6 +55,45 @@ ohos_static_library("libz") {
   subsystem_name = "thirdparty"
 }
 
+ohos_shared_library("shared_libz") {
+  sources = [
+    "adler32.c",
+    "compress.c",
+    "contrib/minizip/ioapi.c",
+    "contrib/minizip/unzip.c",
+    "contrib/minizip/zip.c",
+    "crc32.c",
+    "crc32.h",
+    "deflate.c",
+    "deflate.h",
+    "gzclose.c",
+    "gzguts.h",
+    "gzlib.c",
+    "gzread.c",
+    "gzwrite.c",
+    "infback.c",
+    "inffast.c",
+    "inffast.h",
+    "inffixed.h",
+    "inflate.c",
+    "inflate.h",
+    "inftrees.c",
+    "inftrees.h",
+    "trees.c",
+    "trees.h",
+    "uncompr.c",
+    "zconf.h",
+    "zlib.h",
+    "zutil.c",
+    "zutil.h",
+  ]
+  configs = [ ":zlib_config" ]
+  public_configs = [ ":zlib_public_config" ]
+
+  part_name = "zlib"
+  subsystem_name = "thirdparty"
+}
+
 ohos_ndk_headers("zlib_header") {
   sources = [
     "./zconf.h",