package/libwpe: switch back to version 1.14.2

The versioning scheme for libwpe uses the middle version number to
indicate stability: an even number for stable releases, odd for
development preview releases. As such, Buildroot should be using
version 1.14.2, which is the most recent of the stable releases.
While at it, add a note in the .mk file about the versioning scheme.

Signed-off-by: Adrian Perez de Castro <aperez@igalia.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libwpe/libwpe.hash

@@ -1,6 +1,6 @@
-# From https://wpewebkit.org/releases/libwpe-1.15.1.tar.xz.sums
-sha1  0082ceb475175bfecd1172f2c0b292824d31561b  libwpe-1.15.1.tar.xz
-sha256  14d36a93a05ab7ada9bec581720b8057336fe681bbbe59bda7d50cb8f3eba3a6  libwpe-1.15.1.tar.xz
+# From https://wpewebkit.org/releases/libwpe-1.14.2.tar.xz.sums
+sha1  70a2b894af2b50d7082260158a89524974a480f3  libwpe-1.14.2.tar.xz
+sha256  8ae38022c50cb340c96fdbee1217f1e46ab57fbc1c8ba98142565abbedbe22ef  libwpe-1.14.2.tar.xz
 
 # Hashes for license files:
 sha256  35bef295cedbbf179eaee14328002587a0e7dc08ebf3f15ea080a6f2815f0d7b  COPYING

package/libwpe/libwpe.mk

@@ -4,7 +4,8 @@
 #
 ################################################################################
 
-LIBWPE_VERSION = 1.15.1
+# The middle number is even for stable releases, odd for development ones.
+LIBWPE_VERSION = 1.14.2
 LIBWPE_SITE = https://wpewebkit.org/releases
 LIBWPE_SOURCE = libwpe-$(LIBWPE_VERSION).tar.xz
 LIBWPE_INSTALL_STAGING = YES