feat(spo2): Compile Maxim code into rd117 lib

lib/meson.build

@@ -5,6 +5,7 @@ subdir('./vendor/Bosch/BME680/')
 subdir('./vendor/Bosch/BMA400/')
 subdir('./vendor/Maxim/MAX77650/')
 subdir('./vendor/Maxim/MAX86150/')
+subdir('./vendor/Maxim/rd117_mbed/')
 subdir('./gfx/')
 
 subdir('./FreeRTOS/')

lib/vendor/Maxim/rd117_mbed/meson.build

+includes = include_directories(
+  './',
+)
+
+lib = static_library(
+  'rd117',
+  'RD117_MBED/algorithm/algorithm.c',
+  c_args: '-w',
+)
+
+rd117 = declare_dependency(
+  include_directories: includes,
+  link_with: lib,
+)