Fix spelling mistakes. NFC (#22835)

Author: Antony74

system/lib/README.md

@@ -4,7 +4,7 @@ Source code for C/C++ system libaries
 This directory contains the source code for libc, libc++ and other C/C++ system
 libraries.  Where possible these are clones of upstream projects (e.g. musl).
 For more details about each library see the individual readme files in the
-subdirectoris.
+subdirectories.
 
 Static constructor ordering
 ---------------------------

system/lib/libc/README.md

@@ -13,6 +13,6 @@ Some changes have been made to the version that was taken from upstream, includi
  * Simplify stdout stream handling: do not support seeking, terminal handling, etc., as it just increases code size and Emscripten doesn't have those features anyhow.
  * Setting `_POSIX_REALTIME_SIGNALS` and `_POSIX_SPAWN` macros to -1, to exclude unsupported functions.
 
-Copy log.c and log2.c from ealier version of musl which result in smaller
+Copy log.c and log2.c from earlier version of musl which result in smaller
 binary size since they do not rely data tables in log_data.c and log2_data.c.
 See https://github.com/emscripten-core/emscripten/issues/15483.

system/lib/libc/emscripten_libc_stubs.c

@@ -4,8 +4,8 @@
  * University of Illinois/NCSA Open Source License.  Both these licenses can be
  * found in the LICENSE file.
  *
- * Fake/stub implemenations of libc functions.
- * See emscripten_syscall_stubs.c for fake/stub implemenations of syscalls.
+ * Fake/stub implementations of libc functions.
+ * See emscripten_syscall_stubs.c for fake/stub implementations of syscalls.
  */
 
 #include <errno.h>

system/lib/libc/emscripten_syscall_stubs.c

@@ -4,7 +4,7 @@
  * University of Illinois/NCSA Open Source License.  Both these licenses can be
  * found in the LICENSE file.
  *
- * Unimplemented/dummy syscall implemenations. These fall into 3 catagories.
+ * Unimplemented/dummy syscall implementations. These fall into 3 catagories.
  *
  * 1. Fake it, use dummy/placeholder values and return success.
  * 2. Fake it, as above but warn at runtime if called.

system/lib/wasmfs/emscripten.cpp

@@ -7,7 +7,7 @@
 // This file contains implementations of emscripten APIs that are compatible
 // with WasmFS. These replace APIs in src/library*js, and basically do things
 // in a simpler manner for the situation where the FS is in wasm and not JS
-// (in particular, these implemenations avoid calling from JS to wasm, and
+// (in particular, these implementations avoid calling from JS to wasm, and
 // dependency issues that arise from that).
 //