Pull in tzcode submodule and add tzdata assets

These are used for timezone conversions between POSIX and calander time.

Tzdata is in exactly the same format as HOS to allow loading sysarchives
in the future if needed. See its README for more info.

Details on tzcode can be found in its own repo, there are several
changes done Vs the base release to allow for HOS compat.

.gitmodules

@@ -16,4 +16,8 @@
 	url = https://github.com/serge-sans-paille/frozen
 [submodule "app/libraries/pugixml"]
 	path = app/libraries/pugixml
-	url = https://github.com/zeux/pugixml.git
+	url = https://github.com/zeux/pugixml.git
+[submodule "app/libraries/tzcode"]
+	path = app/libraries/tzcode
+	url = https://github.com/bylaws/tz
+	branch = master

app/CMakeLists.txt

@@ -17,6 +17,7 @@ if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
 endif ()
 
 add_subdirectory("libraries/fmt")
+add_subdirectory("libraries/tzcode")
 
 add_subdirectory("libraries/oboe")
 include_directories("libraries/oboe/include")
@@ -172,5 +173,5 @@ add_library(skyline SHARED
         ${source_DIR}/skyline/services/prepo/IPrepoService.cpp
         )
 # target_precompile_headers(skyline PRIVATE ${source_DIR}/skyline/common.h) # PCH will currently break Intellisense
-target_link_libraries(skyline vulkan android fmt lz4_static oboe mbedtls::mbedcrypto)
+target_link_libraries(skyline vulkan android fmt lz4_static tzcode oboe mbedtls::mbedcrypto)
 target_compile_options(skyline PRIVATE -Wall -Wno-unknown-attributes -Wno-c++20-extensions -Wno-c++17-extensions -Wno-c99-designator -Wno-reorder -Wno-missing-braces -Wno-unused-variable -Wno-unused-private-field)

app/build.gradle

@@ -74,6 +74,10 @@ android {
             path "CMakeLists.txt"
         }
     }
+
+    aaptOptions {
+        ignoreAssetsPattern "*.md"
+    }
 }
 
 dependencies {

app/src/main/assets/tzdata/README.md

@@ -0,0 +1,11 @@
+## TzData prebuilts in HOS format
+
+Based off tzdb 2021a
+
+Generate as normal then
+```
+rm *.tab
+rm leapseconds
+
+find -type f | sed 's/\.\///g' | grep -v '\.' | sort > ../binaryList.txt
+```