Copy ICU4C 59 release from icu-project.org to aosp/icu59.

These files were exported from the ICU Subversion repository by running
the following command:

svn export \
  http://source.icu-project.org/repos/icu/tags/release-59-1/icu4c icu4c

Change-Id: I7391eb92454063d3f7e32753b5d513861b146b72
diff --git a/icu4c/source/icudefs.mk.in b/icu4c/source/icudefs.mk.in
index 46568f3..9abb872 100644
--- a/icu4c/source/icudefs.mk.in
+++ b/icu4c/source/icudefs.mk.in
@@ -118,6 +118,7 @@
 RANLIB = @RANLIB@
 COMPILE_LINK_ENVVAR = @COMPILE_LINK_ENVVAR@
 UCLN_NO_AUTO_CLEANUP = @UCLN_NO_AUTO_CLEANUP@
+SED = @SED@
 
 # Various flags for the tools