gnu: WebkitGTK: Fix build failure with ICU 65.

* gnu/packages/patches/webkitgtk-icu-65.patch: New file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/webkit.scm (webkitgtk)[source](patches): New field.

gnu/local.mk

@@ -1464,6 +1464,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/wavpack-CVE-2018-7253.patch		\
   %D%/packages/patches/wavpack-CVE-2018-7254.patch		\
   %D%/packages/patches/weasyprint-library-paths.patch		\
+  %D%/packages/patches/webkitgtk-icu-65.patch			\
   %D%/packages/patches/websocketpp-fix-for-boost-1.70.patch	\
   %D%/packages/patches/wicd-bitrate-none-fix.patch		\
   %D%/packages/patches/wicd-get-selected-profile-fix.patch	\

gnu/packages/patches/webkitgtk-icu-65.patch

@@ -0,0 +1,47 @@
+Fix build with ICU 65.
+
+Taken from upstream:
+https://bugs.webkit.org/show_bug.cgi?id=202600
+https://trac.webkit.org/r250747
+
+diff --git a/Source/WTF/wtf/URLHelpers.cpp b/Source/WTF/wtf/URLHelpers.cpp
+index 18e7f13cd615..c584f1a0cb7e 100644
+--- a/Source/WTF/wtf/URLHelpers.cpp
++++ b/Source/WTF/wtf/URLHelpers.cpp
+@@ -301,7 +301,7 @@ static bool allCharactersInIDNScriptWhiteList(const UChar* buffer, int32_t lengt
+     Optional<UChar32> previousCodePoint;
+     while (i < length) {
+         UChar32 c;
+-        U16_NEXT(buffer, i, length, c)
++        U16_NEXT(buffer, i, length, c);
+         UErrorCode error = U_ZERO_ERROR;
+         UScriptCode script = uscript_getScript(c, &error);
+         if (error != U_ZERO_ERROR) {
+diff --git a/Source/WebCore/dom/Document.cpp b/Source/WebCore/dom/Document.cpp
+index 2443e24c9bc4..1fbb3a716006 100644
+--- a/Source/WebCore/dom/Document.cpp
++++ b/Source/WebCore/dom/Document.cpp
+@@ -4954,12 +4954,12 @@ static bool isValidNameNonASCII(const UChar* characters, unsigned length)
+     unsigned i = 0;
+ 
+     UChar32 c;
+-    U16_NEXT(characters, i, length, c)
++    U16_NEXT(characters, i, length, c);
+     if (!isValidNameStart(c))
+         return false;
+ 
+     while (i < length) {
+-        U16_NEXT(characters, i, length, c)
++        U16_NEXT(characters, i, length, c);
+         if (!isValidNamePart(c))
+             return false;
+     }
+@@ -5019,7 +5019,7 @@ ExceptionOr<std::pair<AtomString, AtomString>> Document::parseQualifiedName(cons
+ 
+     for (unsigned i = 0; i < length; ) {
+         UChar32 c;
+-        U16_NEXT(qualifiedName, i, length, c)
++        U16_NEXT(qualifiedName, i, length, c);
+         if (c == ':') {
+             if (sawColon)
+                 return Exception { InvalidCharacterError };

gnu/packages/webkit.scm

@@ -126,6 +126,7 @@ engine that uses Wayland for graphics output.")
               (method url-fetch)
               (uri (string-append "https://www.webkitgtk.org/releases/"
                                   "webkitgtk-" version ".tar.xz"))
+              (patches (search-patches "webkitgtk-icu-65.patch"))
               (sha256
                (base32
                 "04k5h0sid9azsqz9pyq436v1rx4lnfrhvmcgmicqb0c0g9iz103b"))))