leveldb: import from meta-webos and upgrade

* it's needed for newer qtwebkit-5.4

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-extended/leveldb/leveldb/0001-Explicitly-disable-tcmalloc.patch

@@ -0,0 +1,48 @@
+From d6daac04dab4b3acf4b88f16742d1b402cdc3d83 Mon Sep 17 00:00:00 2001
+From: Martin Jansa <Martin.Jansa@gmail.com>
+Date: Wed, 1 Oct 2014 18:54:04 +0200
+Subject: [PATCH] Explicitly disable tcmalloc
+
+Without this change leveldb autodetects tcmalloc from sysroot and
+sometimes became dependant on gperftools
+
+Disable autodetection without TCMALLOC_ENABLED=true pased to make
+
+Upstream-Status: Pending
+Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
+---
+ build_detect_platform | 16 +++++++++-------
+ 1 file changed, 9 insertions(+), 7 deletions(-)
+
+diff --git a/build_detect_platform b/build_detect_platform
+index bb76c4f..a586364 100755
+--- a/build_detect_platform
++++ b/build_detect_platform
+@@ -201,15 +201,17 @@ EOF
+         PLATFORM_LIBS="$PLATFORM_LIBS -lsnappy"
+     fi
+ 
+-    # Test whether tcmalloc is available
+-    $CXX $CXXFLAGS -x c++ - -o $CXXOUTPUT -ltcmalloc 2>/dev/null  <<EOF
+-      int main() {}
++    if [ "$TCMALLOC_ENABLED" = "true" ]; then
++        # Test whether tcmalloc is available
++        $CXX $CXXFLAGS -x c++ - -o $CXXOUTPUT -ltcmalloc 2>/dev/null  <<EOF
++          int main() {}
+ EOF
+-    if [ "$?" = 0 ]; then
+-        PLATFORM_LIBS="$PLATFORM_LIBS -ltcmalloc"
+-    fi
++        if [ "$?" = 0 ]; then
++            PLATFORM_LIBS="$PLATFORM_LIBS -ltcmalloc"
++        fi
+ 
+-    rm -f $CXXOUTPUT 2>/dev/null
++        rm -f $CXXOUTPUT 2>/dev/null
++    fi
+ fi
+ 
+ PLATFORM_CCFLAGS="$PLATFORM_CCFLAGS $COMMON_FLAGS"
+-- 
+2.1.1
+

meta-oe/recipes-extended/leveldb/leveldb_git.bb

@@ -0,0 +1,27 @@
+SUMMARY = "LevelDB is a fast key-value storage library"
+DESCRIPTION = "LevelDB is a fast key-value storage library that provides an ordered mapping from string keys to string values"
+HOMEPAGE = "http://leveldb.googlecode.com"
+LICENSE = "BSD-3-Clause"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=92d1b128950b11ba8495b64938fc164d"
+
+SRCREV = "803d69203a62faf50f1b77897310a3a1fcae712b"
+PV = "1.18+git${SRCPV}"
+
+SRC_URI = "git://github.com/google/${BPN}.git \
+    file://0001-Explicitly-disable-tcmalloc.patch \
+"
+
+S = "${WORKDIR}/git"
+
+do_compile() {
+    # do not use oe_runmake. oe_runmake pass to make compilation arguments and override
+    # leveldb makefile variable CFLAGS and broke leveldb build.
+    CFLAGS="${CFLAGS}" make || die
+}
+
+do_install() {
+    install -d ${D}${libdir}
+    oe_libinstall -C ${S} -so libleveldb ${D}${libdir}
+    install -d ${D}${includedir}/leveldb
+    install -m 644 ${S}/include/leveldb/*.h ${D}${includedir}/leveldb/
+}