Updated icu4c to 64.2

Makefile

 all:
-	tar xf icu4c-62_1-src.tgz
-	patch -Np1 -d icu < icu4c-62_1-libfix.patch
+	tar xf icu4c-64_2-src.tgz
 	cd icu/source && ./configure --prefix=/usr
 	$(MAKE) -C icu/source
 	$(MAKE) -C icu/source check

icu4c-62_1-libfix.patch

-diff -uNr icu/source/config/mh-linux icu-libfix/source/config/mh-linux
---- icu/source/config/mh-linux	2018-06-21 19:09:25.000000000 +0930
-+++ icu-libfix/source/config/mh-linux	2018-07-09 00:53:34.720561113 +0930
-@@ -23,7 +23,7 @@
- LD_RPATH_PRE = -Wl,-rpath,
- 
- ## These are the library specific LDFLAGS
--LDFLAGSICUDT=-nodefaultlibs -nostdlib
-+LDFLAGSICUDT=
- 
- ## Compiler switch to embed a library name
- # The initial tab in the next line is to prevent icu-config from reading it.