Try to fix symbol tests in CI

aarch64-symbol-imports.txt

@@ -1,3 +1,4 @@
+__aarch64_cas8_relax
 __stack_chk_fail@GLIBC_2.17
 __stack_chk_guard@GLIBC_2.17
 abort@GLIBC_2.17

include/ConflictSet.h

@@ -90,18 +90,19 @@ struct __attribute__((__visibility__("default"))) ConflictSet {
 
   /** Experimental! */
   struct MetricsV1 {
-    /** A null-terminated string with static lifetime. Matches the regex
-     * [a-zA-Z_:][a-zA-Z0-9_:]*
+    /** A null-terminated string with static lifetime. Identifies this metric.
+     * Matches the regex [a-zA-Z_:][a-zA-Z0-9_:]*
      */
     const char *name;
-    /** A null-terminated string with static lifetime.  May contain any sequence
-     * of UTF-8 characters (after the metric name), but the backslash and the
-     * line feed characters have to be escaped as \\ and \n, respectively.
+    /** A null-terminated string with static lifetime. Describes this metric.
+     * May contain any sequence of UTF-8 characters, but the backslash and the
+     * line feed characters are escaped as \\ and \n, respectively.
      */
     const char *help;
     /** Counters are >= 0 and non-decreasing. Gauges are any value. */
     enum Type { Counter, Gauge } type;
-    /** Get the most up-to-date value available for this metric. Thread-safe. */
+    /** Get the most up-to-date (best effort) value for this metric.
+     * Thread-safe. */
     double getValue() const;
     /** @private */
     void *p;

symbol-exports.txt

@@ -16,3 +16,4 @@ _ZN8weaselab11ConflictSetaSEOS0_
 _ZNK8weaselab11ConflictSet12getMetricsV1EPPNS0_9MetricsV1EPi
 _ZNK8weaselab11ConflictSet5checkEPKNS0_9ReadRangeEPNS0_6ResultEi
 _ZNK8weaselab11ConflictSet8getBytesEv
+_ZNK8weaselab11ConflictSet9MetricsV18getValueEv