[feat] Add support for BQ/Fnac devices (#4294)

Adds support for devices found in https://blog.bq.com/es/bq-ereaders-developers-program/. Tested on BQ Cervantes 4 (last BQ device from 2017).

It adds a new touch input event handler (discussed in #4275) which should work on other single touch devices (ie: Kobo Touch, Mini, Glo, Aura HD) but wasn't tested.

Includes base bump with: [feat] Add BQ/Fnac device support (https://github.com/koreader/koreader-base/pull/745)

kodev

@@ -116,6 +116,7 @@ SUPPORTED_TARGETS="
     kindlepw2       With compiler optimizations for Kindle models >= Paperwhite 2
     kindle-legacy   Needed only for Kindle2/3/DXG
     kobo
+    cervantes
     sony-prstux
     android
     pocketbook
@@ -168,6 +169,10 @@ ${SUPPORTED_TARGETS}"
 
     check_submodules
     case "${1}" in
+        cervantes)
+            make TARGET=cervantes
+            assert_ret_zero $?
+            ;;
         kindle)
             make TARGET=kindle
             assert_ret_zero $?
@@ -272,6 +277,9 @@ ${SUPPORTED_TARGETS}"
             echo "${CLEAN_HELP_MSG}"
             exit 0
             ;;
+        cervantes)
+            make TARGET=cervantes clean
+            ;;
         kindle)
             make TARGET=kindle clean
             ;;
@@ -389,6 +397,10 @@ ${SUPPORTED_RELEASE_TARGETS}"
             kodev-build sony-prstux
             make TARGET=sony-prstux update
             ;;
+        cervantes)
+            kodev-build cervantes
+            make TARGET=cervantes update
+            ;;
         kindle-legacy)
             kodev-build kindle-legacy
             make TARGET=kindle-legacy update