update libc to new version and fix CMake (compile math library)

Author: moskvanaft

contracts/musl/CMakeLists.txt

@@ -4,7 +4,7 @@ file(GLOB ENV_SOURCES  "upstream/src/env/*.c")
 file(GLOB ERRNO_SOURCES  "upstream/src/errno/*.c")
 file(GLOB EXIT_SOURCES  "upstream/src/exit/*.c")
 file(GLOB LOCALE_SOURCES "upstream/src/locale/*.c")
-file(GLOB MALLOC_SOURCES  "upstream/src/malloc/*.c")
+file(GLOB MATH_SOURCES  "upstream/src/math/*.c")
 file(GLOB MBYTE_SOURCES  "upstream/src/multibyte/*.c")
 file(GLOB MISC_SOURCES "upstream/src/misc/*.c")
 file(GLOB SEARCH_SOURCES "upstream/src/search/*.c")
@@ -13,12 +13,12 @@ file(GLOB STDLIB_SOURCES "upstream/src/stdlib/*.c")
 file(GLOB STRING_SOURCES "upstream/src/string/*.c")
 file(GLOB TIME_SOURCES "upstream/src/time/*.c")
 file(GLOB THREAD_SOURCES "upstream/src/thread/*.c") #only for __lock __unlock
-set(INTERNAL_SOURCES upstream/src/internal/intscan.c upstream/src/internal/shgetc.c upstream/src/internal/libc.c)
+set(INTERNAL_SOURCES upstream/src/internal/floatscan.c upstream/src/internal/intscan.c upstream/src/internal/shgetc.c upstream/src/internal/libc.c)
 
 add_wast_library(TARGET libc
   NOWARNINGS
-  SOURCE_FILES ${CRYPT_SOURCES} ${CTYPE_SOURCES} ${ENV_SOURCES} ${ERRNO_SOURCES} ${EXIT_SOURCES} ${INTERNAL_SOURCES} ${LOCALE_SOURCES} ${MBYTE_SOURCES}
-  ${MISC_SOURCES} ${SEARCH_SOURCES} ${STDIO_SOURCES} ${STDLIB_SOURCES} ${STRING_SOURCES} ${TIME_SOURCES} ${THREAD_SOURCES}
+  SOURCE_FILES ${CRYPT_SOURCES} ${CTYPE_SOURCES} ${ENV_SOURCES} ${ERRNO_SOURCES} ${EXIT_SOURCES} ${INTERNAL_SOURCES} ${LOCALE_SOURCES} ${MATH_SOURCES}
+  ${MBYTE_SOURCES} ${MISC_SOURCES} ${SEARCH_SOURCES} ${STDIO_SOURCES} ${STDLIB_SOURCES} ${STRING_SOURCES} ${TIME_SOURCES} ${THREAD_SOURCES}
   INCLUDE_FOLDERS ${CMAKE_SOURCE_DIR}/contracts/musl/upstream/include
                   ${CMAKE_SOURCE_DIR}/contracts/musl/upstream/src/internal
                   ${CMAKE_SOURCE_DIR}/contracts/musl/upstream/arch/eos